报告题目：Investigating the link between the growth of SMBHs and their host galaxies with X-ray surveys

　　报告人：Dr. Qingling Ni （倪清泠）（MPE）

　　报告摘要： X-ray surveys have been an effective way to study growing supermassive black holes (SMBHs). Utilizing X-ray survey fields that have extensive multiwavelength data coverage, we can probe how SMBH growth links with the properties of their host galaxies, which will ultimately help to investigate the physical mechanisms behind the potential coevolution of SMBHs and their hosts. In my talk, I will present the relation between SMBH growth and host-galaxy compactness (represented by the central surface-mass density) we found among star-forming galaxies, which is more significant than the relation between SMBH growth and stellar mass or star formation rate. I will also present how the growth of SMBHs varies with Dn4000 (which is closely related to the age of stellar populations) measured from spectra of their hosts. We found that when controlling for various other host-galaxy properties, AGN fraction and SMBH growth level are higher among younger galaxies at Dn4000 < 1.9, consistent with the expectation from the stellar mass loss fueling scenario. Among the oldest/most massive galaxies at low redshift, this trend is not present, which may be associated with additional fueling from hot halo gas and/or enhanced accretion capability.

　　报告时间：2023年8月25日（周五）10:00

　　报告地点：仙林园区3-402室

欢迎大家参加！